MESON Chess Problem Database

Problem Display
PID: 55766 (8/8/8/1Kp1Q2r/p5B1/8/1n2R1p1/nrbk1bR1 w - - 0 1)

Guidelli, Giorgio

Good Companions (July), 1917

8/8/8/1Kp1Q2r/p5B1/8/1n2R1p1/nrbk1bR1

#2

5 + 10

3132 The Good Companion Two-Mover 1922
6479 Problemschach (Sidler) 1968
102 Probleemblad 2004
136 Problem Observer 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3+
      • 2.Rb2#
    • 1...Sc4+
      • 2.Rb2#
    • 1...c4
      • 2.Rxb2#
      • 2.Rf2#
      • 2.Rexg2#
  • Keys
    • 1.Qc3!
      • threat
        • 2.Qe1#
      • 1...Sd3+
        • 2.Rb2#
      • 1...Sc4+
        • 2.Rb2#
      • 1...c4+
        • 2.Re5#
      • 1...Bd2
        • 2.Qxd2#
      • 1...Sc2
        • 2.Qxc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(f);CHECK,N_PINR(B)::B(C)+R(B)
  • Actual
    • Q(E);
    • Threat
      • QAR1(E)
    • Vars
      • S(f);CHECK,N_PINR(B)::B(C)+R(B)
      • P(i);CHECK,N_PINR(B)::B(C)+R(B)
      • B(c);N_GUARD::QAR1(E),XB(c)
      • S(a);N_GUARD::QAB1(E),XS(a)
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